Most of us don't get adequate amounts of vitamin D because we spend the majority of our day indoors. If you can't get out there and soak up the rays, you may need to take a closer look at your diet...

SUNDAY, Feb. 27 (HealthDay News) -- A new study says it takes far more vitamin D than initially thought to dramatically cut the risk of several major diseases, including breast cancer....

We found that daily intakes of vitamin D by adults in the range of 4,000-8,000 IU are needed to maintain blood levels of vitamin D metabolites in the range needed to reduce by about half the risk of several diseases -- breast cancer, colon cancer, multiple sclerosis and type 1 diabetes," study co-author Dr. Cedric Garland, a professor of family and preventive medicine at the University of California at San Diego, said in a university news release.

SOURCE: University of California at San Diego, press release, Feb. 22, 2011